n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 8 |
4 | 54 |
5 | 144 |
6 | 2880 |
7 | 5760 |
8 | 206640 |
9 | 1491840 |
10 | 24675840 |
11 | 43545600 |
12 | 10298534400 |
13 | 6706022400 |
14 | 1195587993600 |
15 | 33476463820800 |
16 | 775450900224000 |
17 | 376610217984000 |
18 | 553805325545472000 |
19 | 128047474114560000 |
20 | 339876410542276608000 |
21 | 6208765924866785280000 |
[1,3,8,54,144,2880,5760,206640,1491840,24675840, 43545600,10298534400,6706022400,1195587993600, 33476463820800,775450900224000,376610217984000, 553805325545472000,128047474114560000, 339876410542276608000,6208765924866785280000] |